Heijnens, L. J. M., Halma, J. J., Gaalen, S. M. van and Gast, A. de (2014) “Poor intermediate-term survival of the uncemented Optan anatomically adapted femoral component”, Acta Orthopaedica, 85(4), pp. 363–367. doi: 10.3109/17453674.2014.934185.